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Resolution
• Please refer to the guidelines below: ‘Focussing the Camera on the Aperture’ to identify the
adjustment required. Please note the rotation of the focus ring required to bring the aperture
blades into fine focus is minimal as each unit is pre-set prior to shipping.
• It is best practice to adjust the focus ring whilst the sample image is out of focus; concentrate
only on bringing the aperture blades into focus. It may be useful to zoom in on one aperture
edge using your imaging software.
Focussing the Camera on the Aperture
If the Optosplit II aperture is not in sharp focus, then adjust the fine focus on the camera as follows:
• Set an aperture size of less than half the width of the camera frame.
• Loosen the two hex screws on the Focus ring
• Separate the two images slightly with the Split control.
• Loosen the C-mount hex screws.
• Adjust the focus by turning the focus ring whilst ensuring the optosplit is secure, and holding the
camera, until the aperture edges are in sharp focus.
• Then, lock off the focus ring by re-tightening the hex screws. Ensure the camera is again lined up
with its top orientated the same way as the top of the Optosplit II and then lock off the Camera
C-mount.
Focus ring
Hex screws
Camera C-mount
Split adjuster
